"Sir.. Oru Sandhegam" comes from the author, who has more than 1500 Novels and 2000 short stories in his name, Novelist Rajesh Kumar. This book is a unique attempt to approach our day-to-day activities in a scientific manner in the simplified Tamil language of the author, who was a teacher by profession in his early days. This book is presented in the Q & A format to make more interesting and exciting.It is a digest of Q & As compiled by the author. All the questions were from the readers, and the students and the teachers of various schools in Tamilnadu on multiple topics in various aspects of science and the animal kingdom. The book is available in two volumes. You are holding part 2 of the series.